The only opinion I have is "That Sucks"!
Any bike-car accident where you perform the first responder duties and still are able to walk out of the hospital with minimal injuries is a win in some way.
I ask this like a true bicyclist, was your bike trashed?
I wonder if the soreness is some weird combination of adrenaline, lactic acid and extreme muscle tension during the accident.
Best of luck Pierre
What we think, or what we know, or what we believe, is in the end, of little consequence. The only thing of consequence is what we do. -John Ruskin